【Go】基础语法之接口

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接口定义：

利用关键字interface来定义一个接口，接口是一组方法的集合。

例如：

type People interface {
    Show(name string, age int) (id int, err error)  
    Set(name string, age int)
}

接口的实现：

跟结构体的成员方法实现是一样的。

func (object of implement func) func_name (parameters) (return type){

....//func body

}

例如：

package main

import "fmt"
func main() {
    fmt.Println("=================Live interface===============")
    var live Live
    s := &Student{People{"puyangsky", 22, 007}, 0}
    live = s
    live.speak("I am happy")
    live.eat()
    fmt.Println("================Earn interface================")
    var earn Earn
    earn = &Worker{People{"humeiling", 22, 002}, 0}
    earn.eat()
    earn.work()
    earn.getMoney(100)
    fmt.Println("=====================End======================")
}


type People struct {
    name string
    age int32
    id int32
}

type Student struct{
    People
    grade float32
}

type Worker struct{
    People
    salary float32
}

type Live interface {
    eat()
    speak(something string)
}

type Earn interface {
    eat()
    work()
    getMoney(money int32)
}

func (s *Student) eat()  {
    fmt.Printf("%s is eating...\n", s.name)
}

func (s *Student) speak(something string) {
    fmt.Printf("%s is speaking: %s\n", s.name, something)
}

func (w *Worker) eat()  {
    fmt.Printf("%s is eating ...\n", w.name)
}

func (w *Worker) work()  {
    fmt.Printf("%s is working...\n", w.name)
}

func (w *Worker) getMoney(money int32) {
    fmt.Printf("%s earned %d money..\n", w.name, money)
}